void Level::Paint(bool cameraControl, bool HUDControl)
{
// Paint depending on the level state
switch (m_LevelState)
{
case LevelState::PLAYING:
GamePaint(cameraControl, HUDControl);
break;
case LevelState::OBJECTIVE:
GamePaint(cameraControl, HUDControl);
ObjectivePaint();
break;
case LevelState::COMPLETED:
GamePaint(cameraControl, HUDControl);
CompletedPaint();
break;
case LevelState::FAILED:
GamePaint(cameraControl, HUDControl);
FailedPaint();
break;
case LevelState::PAUSED:
GamePaint(cameraControl, HUDControl);
MenuPaint();
break;
default:
break;
}
}
void T_Engine::StartEngine()
{
MSG msg;
static int TickElapsed = 0;
int nowTick;
GameWinInit();
srand( (unsigned)time( NULL ) );
while (TRUE)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT) break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
if (!GetSleep())
{
nowTick = GetTickCount();
if (nowTick > TickElapsed)
{
TickElapsed = nowTick + GetInterval();
GameLogic();
GamePaint(bufferDC);
HDC hDC = GetDC(m_hWnd);
BitBlt(hDC, 0, 0, WIN_WIDTH, WIN_HEIGHT, bufferDC, 0, 0, SRCCOPY);
ReleaseDC(m_hWnd, hDC);
}
}
}
}
pEngine->GameEnd();
}
void GameCycle()
{
if(!g_bGameOver)
{
if((rand() % g_iDifficulty) == 0)
{
AddMeteor();
}
/* if(g_pBackgroundLayer -> GetViewport().bottom < 0)
{
g_pBackgroundLayer -> SetSpeed(0);
} 要實現滾動到某一座標停止加上該段代碼（該段代碼為滾動至頂部停止，可根據需要修改）*/
g_pScrollingBackground -> Update();
g_pGame -> UpdateSprites();
HWND hWindow = g_pGame -> GetWindow();
HDC hDC = GetDC(hWindow);
GamePaint(g_hOffscreenDC);
BitBlt(hDC, 0, 0, g_pGame -> GetWidth(), g_pGame -> GetHeight(), g_hOffscreenDC, 0, 0, SRCCOPY);
ReleaseDC(hWindow, hDC);
}
}
bool GameInit(HWND hwnd)
{
SetTimer(hwnd, 1, 100, nullptr);
PlaySound(_T("Kalafina - believe.wav"), nullptr, SND_ASYNC | SND_FILENAME | SND_LOOP);
/**
* Initial DC
* */
gHDC = GetDC(hwnd);
gBufferDC = CreateCompatibleDC(gHDC);
/**
* Init images to form anim
* */
std::wstring images[11];
for (int i = 0; i < 11; i++)
{
images[i] = _T("Loli");
WCHAR buffer[20];
wsprintf(buffer, L"%d.bmp", i);
images[i] += buffer;
gBmp[i] = (HBITMAP)LoadImage(nullptr, images[i].c_str(), IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE|LR_DEFAULTSIZE);
}
GamePaint(hwnd);
return true;
}
LRESULT GEN::GameEngine::HandleEvent(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
// Route Windows messages to game engine member functions
switch (msg)
{
case WM_SETFOCUS:
// Activate the game and update the Sleep status
GameActivate(hWindow);
SetSleep(FALSE);
return 0;
case WM_KILLFOCUS:
// Deactivate the game and update the Sleep status
GameDeactivate(hWindow);
SetSleep(TRUE);
return 0;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC = BeginPaint(hWindow, &ps);
// Paint the game
GamePaint(hDC);
EndPaint(hWindow, &ps);
return 0;
case MM_MCINOTIFY:
if (LOWORD(wParam) == MCI_NOTIFY_SUCCESSFUL)
{
if (GetMIDIPlayer() != nullptr)
GetMIDIPlayer()->Restart(hWindow);
}
return 0;
// Mouse Input Cases
case WM_LBUTTONDOWN:
// handle mouse button
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_LBUTTONUP:
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_RBUTTONDOWN:
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_RBUTTONUP:
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_MOUSEMOVE:
MouseMove(LOWORD(lParam), HIWORD(lParam));
return 0;
}
return DefWindowProc(hWindow, msg, wParam, lParam);
}
void GameCycle()
{
g_pGame->UpdateSprites();
HWND hWindow = g_pGame->GetWindow();
HDC hDC = GetDC(hWindow);
GamePaint(g_hOffscreenDC);
// Blit the offscreen bitmap to the game screen
BitBlt(hDC, 0, 0, g_pGame->GetWidth(), g_pGame->GetHeight(),
g_hOffscreenDC, 0, 0, SRCCOPY);
// Cleanup
ReleaseDC(hWindow, hDC);
}
void GEN::GameEngine::BltOffscreenBuffer()
{
HDC hdc = GetDC(GetWindow());
// Paint game to offscreen buffer
GamePaint(m_hOffscreenDC);
// blit the offscreen bitmap image to the game screen
BitBlt(hdc, 0, 0, m_iWidth, m_iHeight,
m_hOffscreenDC, 0, 0, SRCCOPY);
// cleanup
ReleaseDC(GetWindow(), hdc);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,LPSTR lpCmdLine, int nShowCmd)
{
WNDCLASSEX wndClass = { 0 };
wndClass.cbSize = sizeof( WNDCLASSEX ) ;
wndClass.style = CS_HREDRAW | CS_VREDRAW;
wndClass.lpfnWndProc = WndProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = 0;
wndClass.hInstance = hInstance;
wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndClass.hCursor = LoadCursor( NULL, IDC_ARROW );
wndClass.hbrBackground = GetStockBrush(WHITE_BRUSH);
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = WINDOW_CLASS;
if( !RegisterClassEx( &wndClass ) )
return -1;
g_hInst = hInstance;
HWND hWnd = InitInstance(hInstance, nShowCmd);
if ( !hWnd)
return -1;
MSG msg = { 0 };
DWORD dwTick, dwPreTick = GetTickCount();
if ( !GameInit(hWnd))
return -1;
while( msg.message != WM_QUIT )
{
if( PeekMessage( &msg, 0, 0, 0, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
dwTick = GetTickCount();
if (dwTick - dwPreTick > 40)
{
if (GameAction(hWnd))
GamePaint(hWnd);
dwPreTick = GetTickCount();
}
}
}
UnregisterClass(WINDOW_CLASS, wndClass.hInstance);
return 0;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
switch (message)
{
case WM_CREATE:
GameInit(hwnd);
break;
case WM_TIMER:
GamePaint(hwnd);
break;
case WM_DESTROY:
GameClearup(hwnd);
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
void GameCycle()
{
if (!_bGameOver)
{
if (!_bDemo)
{
// Randomly add aliens
if ((rand() % _iDifficulty) == 0)
AddAlien();
}
// Update the background
_pBackground->Update();
// Update the sprites
_pGame->UpdateSprites();
// Obtain a device context for repainting the game
HWND hWindow = _pGame->GetWindow();
HDC hDC = GetDC(hWindow);
// Paint the game to the offscreen device context
GamePaint(_hOffscreenDC);
// Blit the offscreen bitmap to the game screen
BitBlt(hDC, 0, 0, _pGame->GetWidth(), _pGame->GetHeight(),
_hOffscreenDC, 0, 0, SRCCOPY);
// Cleanup
ReleaseDC(hWindow, hDC);
}
else
if (--_iGameOverDelay == 0)
{
// Stop the music and switch to demo mode
_pGame->PauseMIDISong();
_bDemo = TRUE;
NewGame();
}
}
LRESULT GameEngine::HandleEvent(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
//Route Windows messages to game engine member fucntions
switch (msg)
{
case WM_CREATE:
//Set the game window and start the game
SetWindow(hWindow);
GameStart(hWindow);
return 0;
case WM_ACTIVATE:
//Activate and deactivate the game and update the Sleep status
if (wParam != WA_INACTIVE)
{
GameActivate(hWindow);
SetSleep(FALSE);
}
else
{
GameDeactivate(hWindow);
SetSleep(TRUE);
}
return 0;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC = BeginPaint(hWindow, &ps);
//Paint the game
GamePaint(hDC);
EndPaint(hWindow, &ps);
return 0;
case WM_LBUTTONDOWN:
//Handle left mouse button press
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_LBUTTONUP:
//Handle left mouse button release
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), TRUE);
return 0;
case WM_RBUTTONDOWN:
//Handle right mouse button press
MouseButtonDown(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_RBUTTONUP:
//Handle right mouse button release
MouseButtonUp(LOWORD(lParam), HIWORD(lParam), FALSE);
return 0;
case WM_MOUSEMOVE:
//Handle mouse movement
MouseMove(LOWORD(lParam), HIWORD(lParam));
return 0;
case WM_DESTROY:
//End the game and exit the application
GameEnd();
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWindow, msg, wParam, lParam);
}
LONG T_Engine::GameEvent(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
HDC hdc;
switch (msg)
{
case WM_SETFOCUS:
SetSleep(FALSE);
return 0;
case WM_KILLFOCUS:
SetSleep(TRUE);
return 0;
case WM_CREATE:
m_hWnd = hWnd;
GameInit();
return 0;
case WM_LBUTTONDOWN:
GameMouseAction(LOWORD(lParam), HIWORD(lParam), MOUSE_LCLICK);
return 0;
case WM_MOUSEMOVE:
GameMouseAction(LOWORD(lParam), HIWORD(lParam), MOUSE_MOVE);
return 0;
case WM_KEYDOWN:
keys[wParam] = true;
GameKeyAction(KEY_DOWN);
SubKeyAction(wParam);
return 0;
case WM_KEYUP:
keys[wParam] = false;
GameKeyAction(KEY_UP);
return 0;
case WM_NCLBUTTONDBLCLK:
if(HTCAPTION==wParam)
{
return 0;
}
case WM_SYSCOMMAND:
if(wParam == SC_MAXIMIZE)
{
m_bFullScreen=!m_bFullScreen;
if(m_bFullScreen)
{
GetWindowRect(hWnd, &m_rcOld);
style = GetWindowLong(hWnd,GWL_STYLE);
ex_style = GetWindowLong(hWnd, GWL_EXSTYLE);
p_disp->SaveMode();
//全屏幕显示
HWND hDesktop;
RECT rc;
hDesktop = GetDesktopWindow();
GetWindowRect(hDesktop, &rc);
p_disp->ChangeMode(wndWidth, wndHeight);
SetWindowLong(hWnd, GWL_EXSTYLE, WS_EX_WINDOWEDGE);
SetWindowLong(hWnd, GWL_STYLE, WS_BORDER);
SetWindowPos(hWnd, HWND_TOP, -1, -1, rc.right, rc.bottom, SWP_SHOWWINDOW);
}
}
else if(wParam == SC_CLOSE)
{
if(IDOK==MessageBox(NULL,L"你确定要退出吗？",
wndTitle, MB_OKCANCEL|MB_ICONQUESTION))
{
DestroyWindow(hWnd);
}
}
else
{
return DefWindowProc(hWnd, WM_SYSCOMMAND, wParam,lParam);
}
return 0;
case WM_CLOSE:
DestroyWindow(hWnd);
return 0;
case WM_PAINT:
PAINTSTRUCT ps;
hdc=BeginPaint(hWnd,&ps);
GamePaint(hdc);
EndPaint(hWnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}
/*******************************************************************************
* ########## 关于Callback回调函数 ##########
*
* 回调函数 Callback functions 是系统程序开发中常用的一种机制。
*
* 在事件\消息驱动型的系统，我们会遇到以下情况：
* （1）系统并不知道应用程序要如何处理事件（如鼠标点击）；
* （2）应用程序不知道何时会发生事件（如鼠标何时被点击）。
* 因此，应用程序定义好处理事件的函数，然后将这个函数的指针传递给操作系统，系统保存这个指针，
* 当事件发生时，系统通过指针调用这个函数。
*
* 因为很多情况下事件的发生都是硬件相关的，只有操作系统通过底层驱动才能获取硬件的IO情况。
* 现代操作系统的设计是不允许应用程序直接和硬件通讯的，必须全部由操作系统来进行管理。
*
* 回调函数并不神秘，基本原理就是函数指针。
* 在消息和事件处理、多线程、异步IO等情况下经常会使用到。
* 回调函数机制是“消息驱动型”程序的基本技术。
*
*******************************************************************************/
LONG CALLBACK MainWndProc(
HWND hwnd, //
UINT msg, // 消息
WPARAM wParam, // 消息参数，不同的消息有不同的意义，详见MSDN中每个消息的文档
LPARAM lParam) // 消息参数，不同的消息有不同的意义，详见MSDN中每个消息的文档
{
// 注意，是switch-case, 每次这个函数被调用，只会落入到一个case中。
switch (msg)
{
// 当窗口被创建时，收到的第一个消息就是WM_CREATE，
// 一般收到这个消息处理过程中，可以用来进行一些初始化的工作
case WM_CREATE:
CreateGame(hwnd,
INIT_TIMER_ELAPSE,
ONE_LEVELS_SCORES,
SPEEDUP_RATIO,
MAX_X, MAX_Y,
INIT_X, INIT_Y,
INIT_SNAKE_LEN,
INIT_DIR);
ReSizeGameWnd(hwnd);
break;
// 当系统认为窗口上的GDI对象应该被重绘时，会向窗口发送一个WM_PAINT消息。
// 当然应用程序也可以通过调用 UpateWindow来主动向窗口发送一个WM_PAINT消息。
// 所有使用GDI在窗口上绘制图形的程序都 “必须” 写在这里。
// 如果不是在WM_PAINT消息的处理过程中绘制GDI图形，那么在窗口刷新时就会被新被抹除和覆盖
case WM_PAINT:
GamePaint(hwnd);
break;
case WM_KEYDOWN:
OnKeyDown(wParam);
GamePaint(hwnd);
break;
case WM_LBUTTONDOWN:
OnTimer(hwnd);
GamePaint(hwnd);
break;
case WM_TIMER:
OnTimer(hwnd);
GamePaint(hwnd);
break;
case WM_DESTROY:
ExitProcess(0);
break;
default:
break;
}
return DefWindowProc(hwnd,
msg,
wParam,
lParam);
}